Paraphrase this :
SCT focuses on children cognitive development and specially emphasizes the integration of social, cultural and biological elements and believes that socio-cultural circumstances play a central role in human’s cognitive development and that the process of the development higher mental functionioning is the one by which people internalize or regulate what they learn from social activities through the mediation of symbolic tools and by going through the zone of proximal development, and during this period, language develops from social speech to private speech and then finally to inner speech or verbal thought.